int* getConcatenation(int* nums, int numsSize, int* returnSize) {
	int* ans = malloc(2 * numsSize * sizeof(int));
	int i = 0;
	for (i = 0; i < numsSize; i++) {
		ans[i] = nums[i];
		ans[i + numsSize] = nums[i];
	}
	*returnSize = 2 * numsSize;
	return ans;
}